383780 has 24 divisors (see below), whose sum is σ = 833280. Its totient is φ = 148320.

The previous prime is 383777. The next prime is 383791. The reversal of 383780 is 87383.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 383780.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311 + ... + 929.

It is an arithmetic number, because the mean of its divisors is an integer number (34720).

2³⁸³⁷⁸⁰ is an apocalyptic number.

It is a pronic number, being equal to 619×620.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 383780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416640).

383780 is an abundant number, since it is smaller than the sum of its proper divisors (449500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

383780 is a wasteful number, since it uses less digits than its factorization.

383780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 383780 is about 619.4997982243. The cubic root of 383780 is about 72.6709402793.

The spelling of 383780 in words is "three hundred eighty-three thousand, seven hundred eighty".